Iceland, which is entirely devoid of alluvial soil, is wholly composed of volcanic tufa, that is to say, an agglomeration of porous rocks and stones.

冰岛完全没有冲积土，完全由火山凝华组成，也就是说，多孔岩石和石头的聚集体。

The mild climate all the way around the coast from Virginia to Texas and the character of the alluvial soil invited the exercise of more imagination.

从弗吉尼亚州到得克萨斯州沿岸一路温和的气候和冲积土壤的特性激发了更多的想象力。